Everywhere I find on the internet says that condoms, when used properly and don’t break, are only 98% effective.
That means if you have sex once a week you’re just as well off as having no protection once a year.
Are 2% of condoms randomly selected to have holes poked in them?
What’s going on?
In: Biology
Effectiveness essentially takes the population as a whole and measures how many people got pregnant.
98% effectiveness doesn’t mean you stand a 2% chance of getting pregnant in each use. It just means that 2% of people got pregnant.
That might be due to an imperfection in the product, but also (more likely) incorrect use, use when expired, damage during handling, incorrect reporting, etc.
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